Computer Science – Performance
Scientific paper
Nov 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988tdar.nasa..237s&link_type=abstract
In its The Telecommunications and Data Acquisition Report p 237-245 (SEE N89-20329 13-32)
Computer Science
Performance
Antenna Design, Deep Space Network, Focusing, Neptune (Planet), Pointing Control Systems, Superhigh Frequencies, Voyager 2 Spacecraft, Computer Programs, Microwaves, Noise Temperature, Subreflectors
Scientific paper
The gain, phase, and pointing performance of the Deep Space Network (DSN) 70 m antennas are investigated using theoretical antenna analysis computer programs that consider the gravity induced deformation of the antenna surface and quadripod structure. The microwave effects are calculated for normal subreflector focusing motion and for special fixed-subreflector conditions that may be used during the Voyager 2 Neptune encounter. The frequency stability effects of stepwise lateral and axial subreflector motions are also described. Comparisons with recently measured antenna efficiency and subreflector motion tests are presented. A modification to the existing 70 m antenna pointing squint correction constant is proposed.
Bathker Dan A.
Slobin Stephen D.
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